GB/T 15063-2020Compound fertilizer (English PDF)

1 Scope

GB/T 15063-2020 is the Chinese national standard on compound fertilizer, in the field of agriculture. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 19 November 2020 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 June 2021. Classification: ICS 65.080, CCS G21. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the terms and definitions, technical requirements, sampling, test methods, inspection rules, marking and quality certificates, packaging, transportation, storage of compound fertilizers. This standard applies to compound fertilizers (including ternary or binary solid fertilizers, which use nitrogen, phosphorus, potassium as basic nutrients, under various names). This standard does not apply to compound fertilizer products, such as monoammonium phosphate and diammonium phosphate.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.

GB/T 3597 Fertilizer - Determination of nitrate nitrogen content - Nitron gravimetric method

GB/T 6274 Fertilizers and soil conditioners - Vocabulary

GB/T 6679 General rules for sampling solid chemical products

GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

GB/T 8569 Packing of solid chemical fertilizers

GB/T 8571 Preparation of laboratory samples for compound fertilizers

GB/T 8572-2010 Determination of total nitrogen content for compound fertilizers titrimetric method after distillation

GB/T 8573 Determination of available phosphorus content for compound fertilizers

GB/T 8574 Determination of potassium content for compound fertilizers - Potassium tetraphenylborate gravimetric method

GB/T 8576 Determination of free water for compound fertilizers - Vacuum oven method

GB/T 8577 Determination of free water for compound fertilizers - Karl Fischer method

3 Terms and definitions

The terms and definitions, as defined in GB/T 6274, as well as the following terms and definitions, apply to this document.

3.1 Compound fertilizer Fertilizers, which are made by chemical methods and/or physical methods, indicating the content of at least two of the three nutrients of nitrogen, phosphorus, potassium.

3.2 Aggregate sample The sample, which is combined from the individual samples of the inspection lot.

Note. For statistical analysis, the aggregate samples can be divided into several samples. for separate subdivision and analysis.

4 Technical requirements

4.1 Appearance Granular, strip or flake products, which have no mechanical impurities.

4.2 Technical indicators The product shall meet the technical indicators in Table

1.At the same time, it shall meet the indicated values on the packaging container.

4.3 Limit requirements for toxic and hazardous substances The biuret content of the products, which are indicated in the packaging container or the instructions for use that, it is suitable for simultaneous sowing of seed fertilizers, shall be <= 0.8%; the limit requirements of other toxic and harmful substances shall be implemented in accordance with GB 38400.

6 Test methods

6.1 General provisions Except for appearance and particle size, make parallel determinations of two sets of samples. The reagents, solutions, water, which is used in this standard, shall comply with the provisions of HG/T 2843, when the specifications and preparation methods are not specified.

6.2 Visual inspection Use the sample in 5.2, to make inspection visually.

7 Inspection rules

7.1 Inspection categories and inspection items Product inspection is divided into exit-factory inspection and type inspection. Total nutrient content, single nutrient content, percentage of water-soluble phosphorus in available phosphorus (when applicable), nitrate nitrogen content (when applicable), moisture, particle size, chloride ion content (when applicable), medium element content (when applicable), trace element content (if applicable), is exit-factory inspection item. Type inspection includes all items in Chapter

4.Type inspection is carried out in one of the following situations.

7.2 Group-batching Products are inspected in batches, which use one or two day output as a batch; the maximum batch is 1500 t.

8 Identification and quality certificate

8.1 If the product contains nitrate nitrogen, it shall be marked with "nitrate nitrogen", on the packaging container.

8.2 When the products, which use the citrate-soluble phosphate fertilizers, such as calcium-magnesium-phosphate fertilizers, as the basic fertilizer, they shall be marked as "citrate-soluble phosphorus", in a prominent position of the packaging container.

8.4 For the products, which contain amide nitrogen (urea nitrogen), it shall be marked with the following warning words, in a prominent position on the packaging container. "Containing biuret; improper use will cause damage to crops". For products, which are not marked with this warning, the inspection and testing agency may select a method for measuring the total nitrogen content for detection and determination, based on the fact that the product does not contain amide nitrogen (urea nitrogen).

8.6 There shall be warnings, precautions for use, etc., on the outer packaging container of the product. Some product information, such as production date or batch number, certificate of conformity, instructions for use, can be marked with easily identifiable QR codes or barcodes.

8.7 If fertilizer additives, other than the requirements of this standard, are marked on the product packaging, it shall mark the name, function, content, corresponding testing method standards of the additives, on the packaging container.

8.8 The marking of nutrient content shall be labelled on the basis of the total material; the material in the packaging container shall not be separated and labelled separately.

8.9 The net content of each bag shall be marked with a single value, such as 50 kg.

8.10 Each batch of qualified exit-factory products shall be accompanied by a quality certificate, which includes. manufacturer's name, address, product name, batch number or date of manufacture, total nutrients, formula or main nutrient content, chloride ion content, biuret content, this standard number, as well as the content that shall be marked according to laws and regulations. For the products, which use the citrate-soluble phosphate fertilizers, such as calcium-magnesium phosphate fertilizers, as the basis, it shall be marked as "citrate-soluble phosphorus"; meanwhile, it shall indicate whether they are "nitrate nitrogen", "urea nitrogen", "organic nitrogen". Non-exit-factory inspection items are marked with the test results of the latest type inspection.

8.11 The rest shall be implemented, in accordance with the provisions of GB 18382.

9 Packaging, transportation, storage

9.1 The product is packaged, by the materials that meet the requirements of GB/T 8569. The packaging specifications are 1000 kg, 50 kg, 40 kg, 25 kg;

9.2 When there are additives in the product, within the stated net content range of each bag, they shall be mixed with the raw materials evenly; they shall not be put into the packaging bag, in the form of small packages.

9.3 On the premise of complying with the provisions of GB/T 8569, it should use the economical and practical packaging.